whiting



UNITED STATES PATENT ()FFICE. f

GEORGE E. \VHITING, OF WASHINGTON, DISTRICT OF COLUMBIA.

OSEPARATING- DIAPHRAGM.

SPECIFICATION forming part of Letters Patent No. 258,835, dated May 30,1882.

Application filed March 18, 1881. (No model.)

To all whom it may concern:

Be it known that I, GEORGE B. WHITING, a citizen ofWashiugton, residingat Washington, in the District of Oolumbia,liaveinvented certain new anduseful Improvements in Separating-Diaphragms; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to letters or figures of reference markedthereon, which form a part of this specification.

My invention relates to separating diaphragms or circulating-plates formarine steamboilers, and the object is to improve the circulation of thewater and secure positive continuous currents in opposite direction, andthis by controlling the action of the water while the boiler or boilersare in operation. I ar-.

range in the back-water connection of the marine boiler aseparating-diaphragm with free passages underneath, and connecting withthe water-bottom space, whereby a better circulation is obtained andsteam is more rapidly generated, while the forming of scale isprevented, which, as is well known to engineers, is more rapidly formedtherethan at any other part of the boiler, and it is caused by eddiesproduced by the conflicting currents or the absence of currentsaltogether. These accumulations resultfrequentlyin great and expensivedamages to the boilers by displacing the water. Different methods havebeen suggested to overcome this serious trouble, more or less expensivein their character, and without entirely satisfactory results.

The invention consistsvin arranging a separating-diaphragm orcirculating-plate in the water-space of the back connection of theboiler of the form and in the manner as will be more full y describedhereinafter, reference being bad to the accompanying" drawings, in whichFigure 1 represents a vertical section of the back connection of theboiler with the separating-diaphragm in position. Fig. 2 is acrosssection on line or w of Fig. 1, looking toward the diaphragm,showing the serrations or openlugs.v

In the drawings, A represents the shell of the boiler, in which E is theback connection;

.suitable manner.

the back water connection F is arranged the separating-diaphragm orcirculating 'ilate G, and secured by the stay-bolts f or in any other ofsaid diaphragm are curved or bent over toward the front of the boiler,and the lower part is provided with a number of openings or serrations,g, so that the water can freely pass from one side to the other of thediaphragm. The diaphragm G is supported, in addition to the stay-bolts,by the lower edge of the said diaphragm, which rests upon the lowerboilersheet by means. of the points 9 of the serrations or openings, asbetter shown in Fig.2. By thus supporting the diaphragm its weight istaken off from the stay-bolts and leakage prevented.

In operation the most intense heat from the furnace strikes theback-connection sheetsb b b, the steam here generated flowing upwardalong its water side 0 c, producing an upward current, which is more orless impeded by the down ward tendency of the water remote from theheated plate causing irregular currents and eddies, and necessarily thedeposition of The upper and lower parts matter held insuspension untilthe water is boiler, butthroughoutall its parts. Two waterspaces areformed, and the steam generated and flowing up along the water side a cc of the plate I) b has no interruptions or check by downward currents,but has a freepand unobstructed passage up the heated-water and steamspaces toward the steam-room above, until it reaches the curved edge ofthe diaphragm, when it is deflected away from the downward currents ofcooler water which descends between the diaphra gm and the rear sheet ofthe boiler-shell, as indicated by the arrows, causing a continuouscurrent while the boiler is in-operation.

I am aware that circulating-plates have been arranged in the water-legsof the furnace and other parts of the boiler, and also that acirculating-plate has been placed in the back connection of the boiler,as shown in English Patent No. 1,716 of 1869. I am also aware thatseparate circulating pipes or tubes are old, as shown in English PatentNo. 3,405 of 1873; and also that an upright boiler with an annularcirculating-plate in the water-legs of the fire-box, is old, as shown inEnglish Patent No. 1,315 of 1873; also, that circulatingplates are shownin Patents No. 144,778, No. 155,093, and No. 89,258; but none of theseare constructed as in my case, and do not accomplish the object soughtto be patented. I am also aware of the English Patent No. 1,674 of 1869,in which a diaphragm is shown in the back connection; but in this saiddiaphragm is also curved backward and will not accomplish the purposesought to be covered by my inven- GEO. B. WHITING.

Witnesses:

RICHARD J. EVANS, W. S. MOORE.

